分别采用分形法和激光粒度检测法定量探讨了气力提升泵和斗式提升机冶金级氧化铝原料颗粒磨损等规律,研究发现两种方法所得结果均表明气力提升泵输送方式对颗粒的磨损程度均为斗式提升机输送方式的两倍以上.从试样的微观形貌观测还发现采用气力提升泵输送后试样表面裂纹明显增多,细颗粒含量增加,这对铝电解生产过程的稳定和电解效率提高均有不利影响,故采用斗式提升机输送工艺更为合理.

超细无机复合修复材料主要用于细微裂缝的修复,因而不仅要保证良好的可灌性,同时较强的抗干缩性能和足够的力学强度也是其主要的工作性能指标.采用正交试验方法研究了水灰比和3种矿物掺合料等四个因素对材料力学性能的影响;通过四元线性方程表征试样干缩率与各因素之间的定量关系.研究表明:材料的优化配合比为,水灰比0.55,混合水泥掺量73％,粉煤灰掺量15％,偏高岭土掺量7％,硅灰掺量5％,减水剂和消泡剂掺量分别为0.6％和0.3％;根据相关数学模型可预测一定条件下材料配比所对应的干缩率值.

试验研究各掺合料和外加剂对灌浆材料流动性能的影响,确定其最佳掺入量.通过正交实验研究分析各项因素综合作用对灌浆材料流动度影响.研究表明:水灰比0.6,硫铝酸盐水泥掺量5％,粉煤灰掺量20％,硅灰掺量3％,减水剂掺量0.7％,缓凝剂掺量4.5％和消泡剂掺量0.3％时对灌浆材料的30min流动性最为有利.

通过研究不同组成的立磨终粉磨水泥试样的颗粒特性,并与相同组成的球磨机终粉磨水泥试样的颗粒特性进行比较,探讨了以立磨为终粉磨装置对不同入磨物料的适应性问题.试验研究结果发现,以立磨对水泥进行终粉磨时,其对入磨物料变化的适应性明显不如球磨机终粉磨系统.然而当物料的易磨性越好时,立磨终粉磨水泥的颗粒特性表现就会越好,此时与球磨终粉磨水泥颗粒特性的差距也会明显变小.

CFB脱硫灰渣是循环流化床锅炉采用脱硫工艺后所得的副产物.针对CFB脱硫灰渣的资源化利用开展将其用作水泥混合材的试验研究,分析灰渣的适宜掺量和主要影响机理.研究表明:CFB脱硫灰、渣在化学组成和颗粒组成上都有较大差异.以脱硫灰为混合材,随其在水泥中的掺量增加,浆体凝结速度明显变缓;试样早强发挥较慢,但28 d强度都能赶上空白对照样的相应强度值,脱硫灰在水泥中最优掺入量为20％左右.将磨细脱硫渣作为水泥混合材,随其掺量增加,试样标准稠度需水量亦呈增大趋势,对水泥凝结时间的影响规律也与脱硫灰相似;水泥早期强度随脱硫渣增加而有所降低,但对28 d强度发展没有明显的不利影响.脱硫渣除可作为混合材外,还能替代部分缓凝石膏,其最大合理掺量为10％左右.

Cement particle characters and their explicit effects to cement physical and mechanical properties are studied in this paper for three kind grinding methods of roller press finish grinding, combined grinding by roller press with ball mill, and single ball mill grinding separately with the same batch of clinker. The experimental results indicate that cement produced by roller press finish grinding has instinctive particle defects which make the water requirement increased and the early hydration action worsened; the cement from ball mill grinding has a better performances on particle characters and early strength, but distinctive problems exist as lower grinding efficiency and higher energy consumption; the combined grinding process presents high grinding efficiency, while the cement particle characters, physical and mechanical properties are also improved obviously.

The effect of stainless steel production residues on clinker burning quality was studied by orthogonal experiment with adding it into high alkali raw meal proportion.And the result showed that the affecting order as follows,residues adding quantity>burning temperature>alkali content,because there are much high activity content of CaO and Fe2O3 and mineralization microelement of F,Cr,Ni in the stainless steel production residues,and it can improve the firing condition of clinker mineral when the high alkali raw meal meet stainless steel production residues at a fitting burning temperature,which can inhibite alkali-aggregate expansion and enhance the clinker quality.

Ca3Co4O9 samples were prepared by pressureless sintering, hot-pressing sintering (HP) and spark plasma sintering (SPS), and the effect of different preparation processes on the thermoelectric properties of Ca3Co4O9 were systematically studied. The results show that comparing with the pressureless sample, samples produced by the HP and SPS method have similar Seebeck coefficient, higher electrical conductivity and thermal conductivity. Electrical conductivity of HP and SPS samples improved much more than the increase of thermal conductivity on the effect of ZT value, so integrated thermoelectric properties: pressureless sample

Oxide thermoelectric material Ca3Co4O9 has drawn much attention since it has unique advantages in comparison with those traditional ones.The basic structure,thermoelectric properties and doping research(Na,Bi,Ag,and etc.)of thermoelectric material Ca3Co4O9 were summarized.Future application of the material was also prospected.

Ca3Co4(FxO1–x) 9(x = 0,0.01,0.02) polycrystalline samples were prepared by the solid-state synthesis method and spark plasma sintering,and effect of fluorine(F) doping on the microstructure and thermoelectric properties of Ca3Co4O9 were systemati-cally researched. The results show that F-doped samples are both single compound. In comparison with the pure sample between 300 K and 900 K,the Seebeck coefficients of F-doped samples change little,electrical conductivities increase obviously,and the thermal conductivities decrease at first but increase with further F addition. The sample with x = 0.01 has the highest electrical conductivity and lowest thermal conductivity,which are 14 × 103 S/m and 2.16 W/(m·K) ,respectively. At 900 K,the sample x = 0.01 has the maxi-mum dimensionless figure of merit(ZT) value of 0.16,which is nearly100% greater than that of the pure sample.

利用溶胶凝胶法在900℃、常压烧成制备出了Ca3(Co1-xZnx)4O9(x=0,0.05,0.10)系列块体材料,研究了Zn掺杂对Ca3CO4O9热电性能的影响,结果表明在580--900 K温度范围内,适量的Zn掺杂能使Ca3CO4O9热电材料的Seebeck系数和电导率同时增大,而热导率减小,从而使热电性能得到了提升.在900 K时,x=0.10样品的ZT最大,达到0.08.

The density of states(DOS) of Ca3Co4O9 and Zn-doped ones are calculated by using density functional and discrete variation method(DFT-DVM) . The relation between electronic structure,chemical bond and thermoelectric property is discussed. The research indicates that the highest valence band(HVB) and the lowest conduction band(LCB) are mainly contributed from Co3d,Zn3d and O2p atomic orbits. The property of semiconductor is shown from the gap between HVB and LCB. The gap of Zn-doped ones is less than that of Ca3Co4O9. The covalent and ionic bonds of Zn-doped ones are both weaker than those of Ca3Co4O9. The results imply that the thermoelectric property may be enhanced by adding Zn element into the system of Ca3Co4O9,which has been proved true.

An experimental study prepared geopolymer by the FGD residues and fly ashes was done,the compressive strength of the geopolymeric products reach up to 36.9 MPa for those cured 28 days.The orthogonal experimental results show that the main factor is the solid-liquid quality ratio,which influence the compressive strength of the products,the compressive strength of the products increased alone with the ratio increased; the content of the FGD residues in the solid materials have smaller influence on the compressive strength of the products.The mechanism of formation was showed by the XRD,SEM and IR analysis results of different periodical products:the glass phase in raw materials dissolved and polymerized in alkali solution,and generated silicate gel,with the curing time,which combined with the undissolved the fly ash particles,finally lead to form homogeneous and dense geopolymer products.

In this paper thermoelectric material Ca3Co4O9 was prepared by solid reaction method with CaF2 doping.The effect of CaF2 doping and second sintering on its microstructure was discussed by contrasting with the pure sample.The result obtained shows that it is easy to increase plate-shaped grain size of thermoelectric material Ca3Co4O9 with the CaF2 doping and the second sintering method.

Desulphurized high-calcium slag, byproduct from circulatory fluid bed of power house in Wuhan Petrochemical Limited Copor., has high calcium and high sulfur content. As the characteristic, experiment was carried out to replace limy raw material of Portland cement with the slag. The study results show that it is feasible to use the desulphrized slag as limy raw material of Portland cement and there are obvious mineralization effect when the mixing content is appropriate, which can improve the burnability of the raw meal and optimize the formation of C3S. When the desulphurized slag mixing content is too much, SO3 content is also high, and so it cann`t promote the formation of C3S and affect the burnability, and the quantitative change has become the qualitative change. And under the experiment condition, mixing content rate of the desulphurized slag should be lower than 15%, and the burning temperature should be at 1 380 ~1 400 ℃.

Research works show that certain mineralization actions to Portland cement clinker can be observed by using desulphation slag, which can reduce pyro-processing temperature, but over dosing will be unfavorable to C3S formation. Using desulphation slag instead of limestone and gypsum to produce sulphoaluminate cement clinker, high-grade clinker with early and high strength features can be produced because of its neomorphic activation functions. In raw meal grinding, its proportioning rate can excess 50%, which is an effective way to comprehensively utilize desulphation slag.

采用分别粉磨再混合的方式,利用正交试验方法,研究了熟料、矿渣及粉煤灰的不同细度组合对复合硅酸盐水泥物理性能的影响.结果表明,熟料细度是影响复合水泥3d强度的决定因素;影响水泥28d强度的主次因素依次为:矿渣细度、熟料细度、粉煤灰细度.得到了复合水泥3种主要组分的细度最佳控制参数为:熟料420m2/kg,矿渣500m2/kg,粉煤灰400m2/kg.并对复合水泥水化各龄期的试样进行了SEM分析.

介绍了湖北省大型国有控股、外资及中小水泥企业的现状及发展趋势,对湖北省新型干法水泥的总体状况及存在的问题作了分析并给出了建议。

In this paper Ca_3Co_4O_9 thermoelectric material were fabricated by the solid reaction method,the most appropriate fabrication technologies were determined through the different sintered temperatures and time of the sample microstructure were analysed.It shows that the second grinding and sintering will help the growth of Ca_3Co_4O_9 plate-shape grains organization,the pure Ca_3Co_4O_9 thermoelectric material were prepared when second grinded and sintered at 900℃.

Experimental study on cement clinker production using ooze from Shuiguo Lake and Nan Lake in Wuhan City was conducted. The results reveal that using proper proportioning of ooze, iron cinder and limestone, qualified Portland cement can he produced.